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High school football is gridiron football played by high school teams in the United States and Canada also by American High school teams in Europe. It ranks among the most popular interscholastic sports in both countries. High school football began in the late 19th century, concurrent with the start of many college football programs. In the late 19th and early 20th century, many college and high school teams played against one another. Other traditions of high school football such as pep rallies, marching bands, mascots, and homecomings are mirrored in college football. No minor league farm organizations exist in American football. Therefore, high school football is generally considered to be the third tier of American football in the United States, behind college and professional competition. It is the first level of play in which a player will accumulate statistics, which will determine his chances of competing at the college level, and ultimately the professional level if he is talented enough. ==Rules== The National Federation of State High School Associations (NFHS) establishes the rules of high school football in the United States. Two states, Texas and Massachusetts, use NCAA playing rules except as shown below. With their common ancestry, the NFHS rules of high school football are largely similar to the college game, though with some important differences: * The four quarters are each 12 minutes in length, as opposed to 15 minutes in all other forms of the game. (Texas uses the NFHS 12-minute quarter; Massachusetts uses 11-minute quarters except in playoffs, where they are 10 minutes because of the possibility of playing three games in 10 days.) * Kickoffs take place at the kicking team's 40-yard line, as opposed to the 35 in college and the NFL. (Both Texas and Massachusetts have adopted the NFHS rule.) * If an attempted field goal is missed it is treated as a punt, normally it would be a touchback and the opposing team will start at the 20-yard line. However, if it does not enter the end zone, it can be downed or returned as a normal punt. * Any kick crossing the goal line is automatically a touchback; kicks cannot be returned out of the end zone. * Pass interference by the defense results in a 15-yard penalty (and through the 2012 season, an automatic first down; the automatic first down provision has been deleted from the rules starting in 2013), regardless of where the foul occurred (unlike the pro ranks where the ball is placed at the spot of the foul). * The defense cannot return an extra-point attempt for a score. * Prior to 2013, offensive pass interference resulted in a 15-yard penalty AND a loss of down. The loss of down provision has been deleted from the rules starting in 2013. In college and the NFL, offensive pass interference is only 10 yards. * The use of overtime, and the type of overtime used, is up to the individual state association. The NFHS offers a suggested overtime procedure based on the Kansas Playoff, but does not make its provisions mandatory. * The home team must wear dark-colored jerseys, and the visiting team must wear white jerseys. In the NFL, the home team has choice of jersey color, and in the NCAA, the home team may wear white with approval of the visiting team. At least one unique high school rule has been adopted by college football. In 1996, the overtime rules originally utilized by Kansas high school teams were adopted by the NCAA, although the NCAA has made two major modifications: (a) starting each possession from the 25-yard line, and (b) starting with the third overtime period, requiring teams to attempt a two-point conversion following a touchdown. Thirty-four states have a mercy rule that comes into play during one-sided games after a prescribed scoring margin is surpassed at halftime or any point thereafter. The type of mercy rule varies from state to state, with many using a "continuous clock" after the scoring margin is reached (wherein, except for specific situations, the clock keeps running on plays where the clock would normally stop), while other states end the game once the margin is reached or passed. Most Canadian schools use Canadian football rules adapted for the high school game. The exception is British Columbia, which uses NFHS rules as used in the United States.〔(【引用サイトリンク】 title=BCFOA Home )〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「High school football」の詳細全文を読む スポンサード リンク
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